Proceedings ArticleDOI
Geometric basis-vector selection methods and subpixel target detection as applied to hyperspectral imagery
Peter Bajorski,Emmett J. Ientilucci +1 more
- Vol. 5, pp 3211-3214
TLDR
This paper compares three basis-vector selection methods as applied to subpixel target detection and finds ROC curves to describe the relationship between the detection rate (DR) and the false alarm rate (FAR).Abstract:Â
In this paper, we compare three basis-vector selection methods as applied to subpixel target detection. This is a continuation of previous research in which a similar comparison was performed based on an AVIRIS image. Our goal is to find out to what extent our previous observations apply more broadly to other images, more specifically, a HYDICE image used in this paper. Our target detection approach is based on generating a radiance target region using a physical model to generate radiance spectra as observed under a wide range of atmospheric, illumination., and viewing conditions. The advantage of this approach is that the resulting target detection is invariant to those changing conditions. For the purpose of target detection, we use a structured model to describe each image spectra as a linear combination of the target and background basis-vectors, and then we apply a matched subspace detector. Finally, we find ROC curves to describe the relationship between the detection rate (DR) and the false alarm rate (FAR). Due to a large number of cases considered, we use summary metrics to represent our results. The obtained results are quite different from those obtained in (Bajorski et al., 2004) for the AVIRIS image. The best method for generating the background basis vectors in the AVIRIS image was the MaxD method, while the SVD method proved to be best for the HYDICE image used in this paper. Further research is needed to find out the reasons for these differences. It is not surprising that different methods are optimal for different types of data. However, it would be useful to be able to recognize the optimal method without assuming knowledge of the targets in the imageread more
Citations
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Proceedings ArticleDOI
Target Detection in a Structured Background Environment Using an Infeasibility Metric in an Invariant Space
TL;DR: In this article, a hybrid target detector that incorporates structured backgrounds and physics-based modeling together with a geometric infeasibility metric is presented. But, the detection algorithm is usually applied to atmospherically compensated hyperspectral imagery.
Journal ArticleDOI
Metrics of spectral image complexity with application to large area search
TL;DR: The concept of the linear mixture model is applied to the question of spectral image complexity at spatially local scales and the ultimate application here is large area image search without a priori information regarding the target signature.
Hyperspectral sub-pixel target detection using hybrid algorithms and Physics Based Modeling
TL;DR: In this article, a new hybrid target detection algorithm called the Physics Based-Structured InFeasibility Target-detector (PB-SIFT) which incorporates Physics Based Modeling (PBM) along with a new Structured Infeasibility Projector (SIP) metric was developed.
Journal ArticleDOI
Practical Evaluation of Max-Type Detectors for Hyperspectral Images
TL;DR: This paper evaluates performance of max-type detectors introduced in earlier work as a special case of generalized fusion, and provides some valuable evaluation tools for re- searchers to investigate performance of other detectors.
Proceedings ArticleDOI
Hybridization of hyperspectral imaging target detection algorithm chains
TL;DR: This research seeks to identify the most effective set of algorithms for a particular image or target type by comparison of the different possible algorithm chains generated using the Forest Radiance I HYDICE data set.
References
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Detection algorithms for hyperspectral imaging applications
Dimitris G. Manolakis,G. Shaw +1 more
TL;DR: This work focuses on detection algorithms that assume multivariate normal distribution models for HSI data and presents some results which illustrate the performance of some detection algorithms using real hyperspectral imaging (HSI) data.
Journal ArticleDOI
Models and methods for automated material identification in hyperspectral imagery acquired under unknown illumination and atmospheric conditions
Glenn Healey,D. Slater +1 more
TL;DR: A comprehensive physical model is used to show that the set of observed 0.4-2.5 /spl mu/m spectral-radiance vectors for a material lies in a low-dimensional subspace of the hyperspectral-measurement space and develops a local maximum-likelihood algorithm for automated material identification that is invariant to illumination, atmospheric conditions, and the scene geometry.
Proceedings ArticleDOI
Comparison of Basis-Vector Selection Methods for Target and Background Subspaces as Applied to Subpixel Target Detection
TL;DR: In this paper, the authors compared three basis vector selection techniques as applied to target detection in hyperspectral imagery, including singular value decomposition (SVD), pixel purity index (PPI), and a newly developed approach called the maximum distance (MaxD) method.
Proceedings ArticleDOI
Overview of algorithms for hyperspectral target detection: theory and practice
TL;DR: An overview of adaptive matched filter and anomaly detectors, including their key theoretical assumptions, design parameters, and computational complexity, and a comparison of different algorithms with regard to the following two desirable performance properties.
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